CN111365992B

CN111365992B - Tube furnace capable of adjusting heat distribution ratio

Info

Publication number: CN111365992B
Application number: CN202010179194.1A
Authority: CN
Inventors: 李坦
Original assignee: Wuhan Nengwang Technology Co ltd
Current assignee: Wuhan Nengwang Technology Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2022-06-07
Anticipated expiration: 2040-03-13
Also published as: CN111365992A

Abstract

The invention discloses a tube furnace capable of adjusting heat distribution ratio, which comprises: a furnace base; the heating furnace is arranged on the furnace base; a low-level combustion area and a high-level combustion area are sequentially arranged in the furnace chamber of the heating furnace from bottom to top along the height direction of the heating furnace; the subarea combustion device is arranged at the bottom of the heating furnace; the zoned combustion device comprises a plurality of combustion devices arranged at the bottom of the heating furnace, and the plurality of combustion devices have different flame directions and are used for forming low-level flames corresponding to the low-level combustion regions or forming high-level flames corresponding to the high-level combustion regions. The invention provides a tubular furnace capable of adjusting heat distribution ratio, and aims to solve the technical problems that the tubular furnace is difficult to control flame size within a safe range and lacks of the function of adjusting heat distribution of different materials in the traditional technology.

Description

Tube furnace capable of adjusting heat distribution ratio

Technical Field

The invention belongs to the field of industrial equipment, and particularly relates to a tube furnace capable of adjusting heat distribution ratio.

Background

For a low-load (small-volume) tube furnace, a flame-adjustable combustion device (a device for releasing heat by combusting fuel) is generally configured and arranged vertically upwards, and the heat load adaptability adjustment of various materials can be realized by changing the flame shape of the combustion device so as to adjust the distribution proportion of heat in the height direction. However, for a large-load (ultra-large volume) tube furnace, the required heat value is larger, and at the moment, the flame of the adjustable flame combustion equipment is adjusted to be larger, so that the flame can rush to the top or the flame licks the tube furnace, and the equipment is damaged; and it is more difficult for a heavy duty tube furnace to regulate the heat distribution of the multiple material heat exchange tubes. Therefore, there is a need to develop a combustion system for a large-volume tube furnace, which can control the flame size within a safe range and can adjust the heat distribution of different materials.

Disclosure of Invention

The invention mainly aims to provide a tube furnace capable of adjusting the heat distribution ratio, and aims to solve the technical problems that the flame size of the tube furnace is difficult to control in a safe range and the heat distribution function of different materials is not adjusted in the prior art.

In order to achieve the above object, the present invention provides a tube furnace capable of adjusting a heat distribution ratio, comprising:

a furnace base;

the heating furnace is arranged on the furnace base; a low-level combustion area and a high-level combustion area are sequentially arranged in the furnace chamber of the heating furnace from bottom to top along the height direction of the heating furnace; and the number of the first and second groups,

the zone combustion device is arranged at the bottom of the heating furnace; the zoned combustion device comprises a plurality of combustion devices arranged at the bottom of the heating furnace, and the plurality of combustion devices have different flame directions and are used for forming low-level flames corresponding to the low-level combustion regions or forming high-level flames corresponding to the high-level combustion regions.

Optionally, the zoned combustion apparatus includes at least one first combustion device vertically disposed at the bottom of the heating furnace, and at least two second combustion devices disposed at the bottom of the heating furnace, where a direction of a flame generated by the first combustion device is vertically upward, a direction of a flame generated by the second combustion device is staggered with a direction of a flame generated by the first combustion device, and directions of flames generated by a plurality of the second combustion devices correspond to each other.

Optionally, the bottom of the heating furnace is provided with at least one sunken combustion chamber in an outward protruding manner, the top of the sunken combustion chamber is provided with an opening communicated with a furnace chamber of the heating furnace, and the plurality of second combustion devices are respectively arranged on the side walls of two opposite sides of the sunken combustion chamber.

Optionally, the sunken combustion chamber is arranged at the central position of the bottom of the heating furnace, and the plurality of first combustion devices are arranged around the sunken combustion chamber;

or the sunken combustion chamber is arranged on the periphery of the bottom of the heating furnace, and the plurality of first combustion devices are arranged on the periphery of the bottom of the heating furnace or/and at the central position of the bottom of the heating furnace.

Optionally, at least one protruding combustion platform is protruded inwards from the bottom of the heating furnace, the first combustion device is disposed at the top of the protruding combustion platform, and the plurality of second combustion devices are respectively disposed on the opposite side walls of the protruding combustion platform and the inner side wall of the heating furnace.

Optionally, at least two of the second combustion devices are horizontally arranged or obliquely arranged upwards, and the flame direction of one part of the second combustion devices is opposite to the flame direction of the other part of the second combustion devices.

Optionally, the zoned combustion apparatus includes two second combustion devices horizontally disposed, and flames generated by the two second combustion devices are opposite to each other;

the zoned combustion device further comprises two vertically arranged first combustion devices, and flames generated by the first combustion devices are arranged side by side.

Optionally, a first medium heating pipeline and a second medium heating pipeline are arranged in the heating furnace, the first medium heating pipeline is arranged in the low-level combustion area, and the second medium heating pipeline is located in the high-level combustion area.

Optionally, the first medium heating pipeline includes a main heating pipeline disposed in the low-level combustion area, and a preheating pipeline disposed in the high-level combustion area, and the preheating pipeline is located above the second medium heating pipeline.

Optionally, a gas conveying device is further arranged on the heating furnace, and the gas conveying device is communicated with the zone combustion devices to convey gas to the zone combustion devices.

In the technical scheme of the invention, the subarea combustion device arranged at the bottom of the heating furnace comprises a plurality of combustion devices arranged at the bottom of the heating furnace; the plurality of combustion devices can form flames in different directions, and low-level flames corresponding to the low-level combustion areas in the heating furnace or high-level flames corresponding to the high-level combustion areas are formed through mutual interference of the flames. The temperature of the low-level flame and the high-level flame is correspondingly changed by controlling the gas quantity of the combustion equipment, so that the effect of changing the heat distribution in different combustion areas of the heating furnace is achieved. The tubular furnace capable of adjusting the heat distribution ratio has a simple structure, flame can be always in a safe range, the service life of the tubular furnace is prolonged, the temperature distribution in the furnace can be changed, the combustion efficiency is improved, and energy is saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a conventional tube furnace according to the conventional art;

FIG. 2 is a schematic diagram of a tube furnace with an adjustable heat distribution ratio according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a schematic three-dimensional structure of a tube furnace with an adjustable heat distribution ratio according to an embodiment of the present invention in an operating state.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1000	Tube furnace capable of adjusting heat distribution ratio	100	Furnace base
200	Heating furnace	210	Low level combustion zone
				220	High level combustion zone	230	Sinking combustion chamber
231	Opening of the container	240	First medium heating pipeline
				241	Main heating pipeline	242	Preheating pipeline
250	Second medium heating pipeline	310	First combustion apparatus
				300	Zoned combustion device	320	Second combustion apparatus

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The flame of the combustion equipment of the conventional tube furnace is vertically upward, after the equipment is put into use, the combustion media in the tube furnace comprise various types, the actual values of the heat loads required by different media deviate from the designed values to a certain extent, the heat loads required by different media cannot be synchronously changed in equal proportion in the load fluctuation process, the requirement for randomly adjusting the heat loads of different media within a certain range also exists in the process of optimizing process parameters, and therefore the heating furnace needs to properly adjust the heat distribution of the bottom flame in the height direction. The traditional low-load tube furnace can be realized by means of gas supply, flame size adjustment of combustion equipment and the like. However, for a large-sized tube furnace, the required heat value is larger, and at the moment, the flame of the combustion equipment is adjusted to be larger, so that the flame can rush to the top or lick the tube, thereby causing damage to the equipment, and therefore, the heat distribution of the heat exchange tubes for various materials of the large-load tube furnace is more difficult to adjust.

In view of the above, the invention provides a tube furnace capable of adjusting the heat distribution ratio, which solves the above problems and has the advantages of simple structure, high combustion efficiency and energy saving. FIG. 1 is a schematic perspective view of a conventional tube furnace according to the conventional art; FIG. 2 is a schematic diagram of a tube furnace with an adjustable heat distribution ratio according to an embodiment of the present invention; FIG. 3 is a schematic diagram of the three-dimensional structure of the tube furnace with adjustable heat distribution ratio according to the embodiment of the present invention in the operating state.

In this embodiment, a conventional tube furnace burning two media is taken as a specific explanation object, please refer to fig. 1, flames of a combustion device of the conventional tube furnace are all vertically upward, a first medium (with a relatively large thermal load demand) flows into the tube furnace from a first convection section, then enters a radiation section to absorb heat, and then leaves the tube furnace to enter a rear-stage process; the second medium (with a relatively low thermal load requirement) flows from the second convection section into the tube furnace and then from the convection section out of the tube furnace into the back-end process. As described above, after the device is put into use, the actual values of the heat loads required by the first medium and the second medium deviate from the design values to some extent, the heat loads required by the first medium and the second medium cannot be synchronously changed in equal proportion in the process of load fluctuation, and the demand for randomly adjusting the heat loads of the first medium and the second medium within a certain range also exists in the process of optimizing process parameters, so that the heating furnace needs to properly adjust the heat distribution of the bottom flame in the height direction. The conventional low-load tube furnace as shown in fig. 1 can be realized by means of gas supply, flame size adjustment of combustion equipment and the like. However, for large tube furnaces, control of flame size and zone temperature becomes more difficult.

Referring to fig. 2, the present invention provides a tube furnace 1000 capable of adjusting a heat distribution ratio, comprising: a furnace base 100; a heating furnace 200 provided on the furnace base 100; the furnace chamber of the heating furnace 200 is internally provided with a low-level combustion area 210 and a high-level combustion area 220 which are sequentially arranged from bottom to top along the height direction of the heating furnace 200; and a zone combustion device 300 arranged at the bottom of the heating furnace 200; the division combustion apparatus 300 includes a plurality of combustion devices disposed at the bottom of the heating furnace 200, and the plurality of combustion devices have different flame directions for forming a low flame corresponding to the low combustion zone 210 or for forming a high flame corresponding to the high combustion zone 220. As described above, the first medium flows into the tube furnace from the first convection section, then enters the radiation section to absorb heat, then leaves the tube furnace, and enters the post-stage process; the second medium flows into the tubular furnace from the second convection section, then leaves the tubular furnace from the convection section and enters a back-end process; in this embodiment, the first medium corresponds to the low level combustion zone 210, and the second medium corresponds to the high level combustion zone 220. The temperature of the low-level flame and the high-level flame is correspondingly changed by controlling the gas quantity of the plurality of combustion devices, so that the heat distribution in different combustion areas of the heating furnace 200 is changed, and the corresponding heating effect on the first medium and the second medium is achieved. The tubular furnace 1000 capable of adjusting the heat distribution ratio has a simple structure, flame can be always in a safe range, the service life of the tubular furnace is prolonged, the temperature distribution in the furnace can be changed, the combustion efficiency is improved, and energy is saved.

Further, the zonal combustion apparatus 300 comprises at least one first combustion device 310 vertically arranged at the bottom of the heating furnace 200, and at least two second combustion devices 320 arranged at the bottom of the heating furnace 200, wherein the direction of the flame generated by the first combustion device 310 is vertically upward, the direction of the flame generated by the second combustion device 320 is mutually staggered with the direction of the flame generated by the first combustion device 310, and the directions of the flames generated by the plurality of second combustion devices 320 correspond to each other. The reason why the directions of the flames generated by the plurality of second combustion devices 320 correspond to each other is to cause the flames generated by the plurality of second combustion devices 320 to interfere with each other, so that the combination of the flames can be achieved, and the effect of the flames with the width changed or the height changed can be obtained, so that the flames have stronger applicability. In this embodiment, the furnace space of the heating furnace 200 is used as a vertical combustion chamber, the directions of flames generated by the plurality of second combustion devices 320 are corresponding to each other, interference is generated, and the central position of the flames is greatly reduced, so that the heat of the flames is released at the middle lower part of the furnace; and the plurality of first combustion devices 310 which are vertically arranged have the flame which is vertically upward, the center of the flame is higher, and the heat of the flame is released at the middle upper part of the hearth. In this way, the lower combustion zone 210 and the upper combustion zone 220 of the heating furnace 200 respectively correspond to the plurality of second combustion devices 320 and the plurality of first combustion devices 310, so as to achieve the effect of respectively controlling the combustion zones of the heating furnace 200.

Referring to fig. 2, the heating furnace 200 is provided with at least one sunken combustion chamber 230 protruding outward from the bottom thereof, the sunken combustion chamber 230 is provided with an opening 231 at the top thereof for communicating with the furnace chamber of the heating furnace 200, and a plurality of second combustion devices 320 are respectively disposed on the sidewalls of the sunken combustion chamber 230 at opposite sides thereof. First, the first combustion device 310 and the second combustion device 320 correspond to different combustion zones, and the heating furnace 200 has a smaller internal space, and if it is not desired to generate interference, the first combustion device 310 and the second combustion device 320 should be arranged in different zones to ensure that they do not interfere with each other, so that the submerged combustion chamber 230 is provided to install the plurality of second combustion devices 320, and the opening 231 communicated with the furnace chamber of the heating furnace 200 also ensures that the flames of the plurality of second combustion devices 320 can enter the furnace chamber to heat the heating furnace 200.

Further, the submerged combustion chamber 230 is arranged at the center of the bottom of the heating furnace 200, and the plurality of first combustion devices 310 are arranged around the peripheral side of the submerged combustion chamber 230; alternatively, the submerged combustion chamber 230 is provided on the bottom peripheral side of the heating furnace 200, and the plurality of first combustion devices 310 are provided on the bottom peripheral side of the heating furnace 200 or/and at the bottom center of the heating furnace 200. The arrangement is such that a space is reserved between the first combustion device 310 and the second combustion device 320, which is large enough to prevent the flames generated by the two devices from interfering, and at the same time, the first combustion device 310 and the second combustion device 320 can be controlled separately. Meanwhile, the lowered combustion chamber allows the center position of the flame to be further moved downward, thereby further controlling the flame generated by the second combustion device 320 to be located within the range of the lower combustion zone 210.

It should be noted that the submerged combustion chamber 230 is not the only implementation, and at least one convex combustion platform is provided at the bottom of the heating furnace 200 to protrude inwards, the first combustion device 310 is provided at the top of the convex combustion platform, and the plurality of second combustion devices 320 are respectively provided on the side wall of the convex combustion platform and the inner side wall of the heating furnace 200, which are opposite to each other, so that the same implementation effects as those of the above-described implementation can be achieved.

As mentioned above, the plurality of second combustion devices 320 are oppositely disposed in order to allow the flames thereof to interfere with each other, thereby achieving an effect of generating new flames with changed sizes and widths. In this embodiment, at least two of the second combustion devices 320 are horizontally disposed or obliquely disposed upward, and the flame direction of one part of the second combustion devices 320 is opposite to the flame direction of another part of the second combustion devices 320. The arrangement is such that the central position of the flame moves downward to correspond to the low-level combustion area 210, in order to cause the flame to interfere.

Referring to fig. 2 and fig. 3, in the present embodiment, the zone-dividing combustion apparatus 300 includes two second combustion devices 320 horizontally disposed, and the flames generated by the two second combustion devices 320 are opposite to each other; two second combustion devices 320 are located in the submerged combustion chamber 230; the zone-dividing combustion apparatus 300 further comprises two first combustion devices 310 vertically arranged, and flames generated by the two first combustion devices 310 are arranged side by side with each other. In this way, the structure is simple, and a relatively excellent implementation effect can be achieved, of course, the number of the first combustion device 310 and the second combustion device 320 is not only the same, but also can be adjusted according to the production operation, and in this embodiment, the first combustion device 310 and the second combustion device 320 may be the same, and only the installation manner of the two is different, which is not limited in this embodiment.

As described above, the present embodiment is described by using a conventional tube furnace using two mediums, and referring to fig. 2, a heating furnace 200 is provided with a first medium heating pipeline 240 and a second medium heating pipeline 250, the first medium heating pipeline 240 is disposed in the low-level combustion zone 210, and the second medium heating pipeline 250 is disposed in the high-level combustion zone 220. The first medium heating pipe 240 includes a main heating pipe 241 provided in the low combustion zone 210, and a preheating pipe 242 provided in the high combustion zone 220, and the preheating pipe 242 is located above the second medium heating pipe 250. The first medium enters from the preheating pipe 242 and is output from the main heating pipe 241, the second medium is directly heated in the high-level combustion area 220, and both the first medium and the second medium flow from high level to low level.

It should be noted that the heating furnace 200 is further provided with a gas delivery device, and the gas delivery device is communicated with the zone combustion device 300 to deliver gas to the zone combustion device 300. The gas delivery to the first combustion device 310 and the second combustion device 320 is separate: for example, when the amount of heat required by the first medium increases and the amount of heat required by the second medium decreases, the temperature field of the furnace needs to be shifted downward, and more heat is released to the first medium in the middle and lower portion of the furnace, so that the amount of gas supplied to the first combustion device 310 can be reduced, the amount of gas supplied to the second combustion device 320 can be increased, and the center position of the flame as a whole is shifted downward, thereby achieving the purpose that the amount of heat of the furnace is shifted downward, the amount of heat obtained in the upper portion decreases, and the amount of heat obtained in the lower portion increases. On the contrary, the gas supply of the first combustion device 310 can be increased, the gas supply of the second combustion device 320 can be decreased, the upward movement of the heat distribution of the hearth can be realized, and more heat can be transferred to the second medium. When the total heat demand of the first medium and the second medium is changed, the total gas supply can be controlled (increased along with the increase of the total heat, and decreased along with the decrease of the total heat), and then the relative gas distribution amounts of the first combustion device 310 and the second combustion device 320 can be adjusted to realize the heat distribution of the two mediums under the total load change.

The tubular furnace 1000 capable of adjusting the heat distribution ratio has a simple structure, flame can be always in a safe range, the service life of the tubular furnace is prolonged, the temperature distribution in the furnace can be changed, the combustion efficiency is improved, and energy is saved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A tube furnace capable of adjusting heat distribution ratio is characterized by comprising:

a furnace base;

the zone combustion device is arranged at the bottom of the heating furnace; the zoned combustion device comprises a plurality of combustion devices arranged at the bottom of the heating furnace, and the plurality of combustion devices have different flame directions and are used for forming low-level flames corresponding to the low-level combustion regions and high-level flames corresponding to the high-level combustion regions;

the zoned combustion device comprises at least one first combustion device and at least two second combustion devices, wherein the first combustion device is vertically arranged at the bottom of the heating furnace, the at least two second combustion devices are arranged at the bottom of the heating furnace, the flame direction generated by the first combustion device is vertically upward, the flame direction generated by the second combustion device is mutually staggered with the flame direction generated by the first combustion device, and the flame directions generated by the second combustion devices correspond to each other.

2. The tube furnace with adjustable heat distribution ratio according to claim 1, wherein the bottom of the furnace is provided with at least one sunken combustion chamber protruding outward, the top of the sunken combustion chamber is provided with an opening communicating with the furnace chamber of the furnace, and the plurality of second combustion devices are respectively provided on the side walls of the sunken combustion chamber on opposite sides.

3. The tube furnace with the adjustable heat distribution ratio according to claim 2, wherein the submerged combustion chamber is arranged at a central position of the bottom of the furnace, and the plurality of first combustion devices are arranged around the submerged combustion chamber;

4. The tube furnace with adjustable heat distribution ratio according to claim 1, wherein the heating furnace has at least one protrusion-type combustion table protruding inward from a bottom thereof, the first combustion device is disposed on a top of the protrusion-type combustion table, and a plurality of the second combustion devices are disposed on opposite side walls of the protrusion-type combustion table and on opposite inner side walls of the heating furnace, respectively.

5. The tube furnace with adjustable heat distribution ratio according to claim 1, wherein at least two of the second combustion devices are horizontally disposed or obliquely disposed upward, and wherein the flame direction of one portion of the second combustion devices is opposite to the flame direction of another portion of the second combustion devices.

6. The tube furnace with adjustable heat distribution ratio according to claim 4, wherein the zone-dividing combustion device comprises two second combustion devices horizontally arranged, and flames generated by the two second combustion devices are opposite to each other;

7. The tube furnace with the adjustable heat distribution ratio according to claim 1, wherein a first medium heating pipeline and a second medium heating pipeline are arranged in the heating furnace, the first medium heating pipeline is arranged in the low-level combustion area, and the second medium heating pipeline is arranged in the high-level combustion area.

8. The tube furnace with adjustable heat distribution ratio according to claim 7, wherein the first medium heating line comprises a main heating line provided in the low level combustion zone, and a preheating line provided in the high level combustion zone, the preheating line being located above the second medium heating line.

9. The tube furnace with the adjustable heat distribution ratio according to claim 1, wherein a gas delivery device is further arranged on the heating furnace, and the gas delivery device is communicated with the zone combustion devices to deliver gas to the zone combustion devices.